Improvement in cutting saw-teeth



dg-inittab gratte getraut @Hifi JAMES MORTON, u OFPHILADELPHIA,PENNSYLVANIA.

Letters Para# No. 75,563, atea March 17, 1868.

IMPROVEMENT 1N eufrr'irc ,saw-Terre."

TO l.ALI-i WHOM IT MAY CONCERN:

Be it known that I, JAMES MORTON, of Philadelphia, in the county ofPhiladelphia, and State of Pennsylvania, have invented a new andimproved Machinefor Cutting .Saw-Teeth; and I do hereby declare'that thefollowing is a full', clear, and exact description thereof, which willenable others skilled in the art to make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification.

Figure 1 represents a side elevation of my improved tooth-cuttingmachine.

Figure 2 is a front elevation of the' same.

Figure S is a detail plan view ofthe same.

Similar letters of reference indicate corresponding parts.

This invention relates to a new machine for cutting the` teeth ofsaw-blades, curry-combs, or other metal plates, and consists inthe useof two revolving circular dies, between which` the article to be toothedis fed. The dies are provided with toothed peripherics, the teeth beingshaped according to the pattern to be cut. The dies are mounted onparallel shafts, with their toothed edges above each other, sothat thetooth on one die will he over a recess in the other die, and vice versa.By revolving the two dies in opposite directions, the

bladewill' bc fed through, and the desired teeth cut into it by theopposite dies.

The object of this invention is to overcome thejordinary method ofstamping, and to produce more accu- 'rate and exact workmanship thancould be maderhy'hand. A, in the drawing, represents a frame, ofsuitable size, construction, and material. In the same are the hearingsfor two parallel shafts B and C, which' carry atv their ends circularheads D and E, respectively, as

is clearly shown in gs. 1 and 2. The shafts B and C are geared together,so that they revolve in opposite directions when they receive rotarymotion from suitable mechanism. Theiedges of the dies are toothed, asshown, the teeth being shaped in the required manner. The dics lare set,one4 above the other, s o that the toothed edges overlap, as shown infigs. 1 and 3. Thedies are so arranged that a tooth on one is alwaysopposite to a recess, iigf3; in 'fact the dies are set seth-at they gearinto each other, the teeth fitting slightly into the opposite recesses.When a sheet-metal plate is introduced between the dies, the teeth 'ofboth dies will, by fitting into the opposite dies, cut with their edgesthrough the blade, and the same will therefore be divided by a zigzagincision `intet-wo strips, of which each will have the required toothededge, or the plat-eis so fed between the dies that its edge i s onlytoothed, when `triangular portions will he cut out.

'ilhc teeth may bcsharp, V-shaped, as shown, or rounded, or ototh'ersuitable shape. I claim as new', and desire to sccureby Letters PatentiA tooth-cutting machine, consisting ofthe two toothed revolving circulardies D and E, geared together and moving in opposite directions,substantially as herein shown and, described.

JAMES MORTON.

Witnesses MARY MONTGOMERY MOMON, REBECCA E. MonToN.

